ES2210574T3 - CONTAINER OF CUBA TYPE OF SYNTHETIC MATERIAL AND PROCEDURE AND DEVICE FOR MANUFACTURING. - Google Patents

CONTAINER OF CUBA TYPE OF SYNTHETIC MATERIAL AND PROCEDURE AND DEVICE FOR MANUFACTURING.

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Publication number
ES2210574T3
ES2210574T3 ES97941820T ES97941820T ES2210574T3 ES 2210574 T3 ES2210574 T3 ES 2210574T3 ES 97941820 T ES97941820 T ES 97941820T ES 97941820 T ES97941820 T ES 97941820T ES 2210574 T3 ES2210574 T3 ES 2210574T3
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Spain
Prior art keywords
annular
synthetic material
synthetic
channel
layer
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Expired - Lifetime
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ES97941820T
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Spanish (es)
Inventor
Gunther Richter
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Individual
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Individual
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/12—Articles with an irregular circumference when viewed in cross-section, e.g. window profiles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/16—Articles comprising two or more components, e.g. co-extruded layers
    • B29C48/18—Articles comprising two or more components, e.g. co-extruded layers the components being layers
    • B29C48/19—Articles comprising two or more components, e.g. co-extruded layers the components being layers the layers being joined at their edges
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/30—Extrusion nozzles or dies
    • B29C48/32—Extrusion nozzles or dies with annular openings, e.g. for forming tubular articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/30—Extrusion nozzles or dies
    • B29C48/32—Extrusion nozzles or dies with annular openings, e.g. for forming tubular articles
    • B29C48/335—Multiple annular extrusion nozzles in coaxial arrangement, e.g. for making multi-layered tubular articles
    • B29C48/336—Multiple annular extrusion nozzles in coaxial arrangement, e.g. for making multi-layered tubular articles the components merging one by one down streams in the die
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/475—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using pistons, accumulators or press rams

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Packages (AREA)
  • Containers Having Bodies Formed In One Piece (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)

Abstract

This invention concerns a drum-like container made of a discontinuously extruded hose-like perform of thermoplastic in a blow molding process. The drum-like container has a wall consisting of an inner layer, an outer layer, and at least one intermediate layer. To make it possible to monitor the fill level of the fill material, the wall has a visual indicator strip of translucent plastic running in the axial direction.

Description

Recipiente de tipo cuba de material sintético y procedimiento y dispositivo para su fabricación.Bowl type of synthetic material and procedure and device for its manufacture.

La invención se refiere a un recipiente de tipo cuba, fabricado en un procedimiento de soplado con una pieza premoldeada de tipo manguera extrusionada de forma discontinua con material sintético termoplástico, con una pared compuesta de una capa interior, una capa exterior y al menos una capa intermedia.The invention relates to a container of type Cuba, manufactured in a one-piece blowing procedure pre-molded type of extruded hose discontinuously with thermoplastic synthetic material, with a wall composed of a inner layer, an outer layer and at least one intermediate layer.

De la publicación de patente europea 0 326 584 se conocen un procedimiento y un dispositivo para fabricar un cuerpo hueco de gran volumen, por ejemplo una cuba de material sintético con una pared de varias capas. Con ello el dispositivo se compone de un émbolo anular desplazable axialmente en una carcasa, que actúa como cabeza coextrusionadora y que presenta, para cada capa de la pared y con ello para cada caldo de material sintético, un taladro de canal de fluencia que discurre casi radialmente y desemboca respectivamente en un distribuidor anular. El distribuidor anular se transforma después en un canal de fluencia común, en el que afluyen uno tras otro los diferentes caldos de material sintético. El canal de fluencia, que se encuentra aproximadamente en el centro del émbolo anular, se ensancha paulatinamente sobre la sección transversal de una cámara de depósito anular impulsada por el émbolo anular.From European Patent Publication 0 326 584, they know a procedure and a device to make a body large volume hollow, for example a bowl of synthetic material With a multi-layered wall. With this the device consists of an axially movable annular piston in a housing, which acts as co-extruder head and presenting, for each layer of the wall and with it for each synthetic stock, a drill of creep channel that runs almost radially and flows respectively in an annular distributor. The ring distributor will then transforms into a common creep channel, in which they flow one after another the different broths of synthetic material. The channel of creep, which is approximately in the center of the annular piston, gradually widens over the section transverse of an annular deposit chamber driven by the plunger cancel.

En recipientes de depósito o transporte, por ejemplo en cubas con una pared de varias capas, la capa exterior de la pared y con esto, sin embargo, también la capa de la pieza premoldeada con la que se fabrica el recipiente de tipo cuba mediante un proceso de soplado, por ejemplo para la protección contra los rayos UV o por motivos ópticos, está dotada de un entintaje especial. Por otro lado existe sin embargo el deseo de ver constantemente desde fuera, sin dispositivos de medición especiales, cuánto líquido se encuentra en el recipiente de tipo cuba.In storage or transport containers, for example in vats with a multilayer wall, the outer layer of the wall and with this, however, also the layer of the piece pre-molded with which the vessel of type Cuba is manufactured by a blowing process, for example for protection against UV rays or for optical reasons, it is equipped with a special inking On the other hand there is however the desire to see constantly from outside, without special measuring devices, How much liquid is in the Cuba-type container.

Del documento DE-GM 91 07 812 se conoce un dispositivo para la fabricación discontinua de una pieza premoldeada coextrusionada de tipo manguera de varias capas de material sintético termoplástico, para formar un recipiente de tipo cuba, fabricado en un procedimiento de soplado, en el que se ha dispuesto entre el canal anular para el caldo de material sintético de la capa interior, que se compone de material sintético claro o transparente, y el canal anular para la capa exterior, que se compone de una masa de material sintético entintada, un canal de unión a través del cual puede generarse en la capa exterior una llamada tira óptica, que hace posible un control del grado de llenado del recipiente acabado. Sin embargo, si la pared del recipiente presenta más de dos capas, con este dispositivo no puede fabricarse ninguna pieza premoldeada para un recipiente de tipo cuba, que posea una tira óptica y de este modo permita un control del nivel de llenado.From DE-GM 91 07 812, know a device for the discontinuous manufacture of a piece pre-molded coextruded multilayer hose type of thermoplastic synthetic material, to form a type container Cuba, manufactured in a blowing procedure, in which it has been arranged between the annular channel for the broth of synthetic material of the inner layer, which is composed of clear synthetic material or transparent, and the annular channel for the outer layer, which It consists of a mass of inked synthetic material, a channel of union through which an outer layer can be generated called optical strip, which makes it possible to control the degree of Filling the finished container. However, if the wall of the container presents more than two layers, with this device can not manufacture any pre-molded part for a container of type Cuba, which has an optical strip and thus allows control of the filling level.

Como estado de la técnica se hace referencia además a los documentos US-A-5464107, EP-A-0491093 y EP-A-0321946.As a state of the art reference is made in addition to the documents US-A-5464107, EP-A-0491093 and EP-A-0321946.

La invención se ha impuesto la misión de crear un recipiente de tipo cuba, cuya pared se componga de al menos tres capas y con el que sea posible controlar el nivel de llenado del material de llenado.The invention has set itself the mission of creating a Cuba-type vessel, whose wall is made up of at least three layers and with which it is possible to control the filling level of the filling material

Esta misión es resuelta mediante las particularidades de la reivindicación 1.This mission is solved by particularities of claim 1.

Un recipiente configurado de este modo hace posible, a causa de la tira óptica, que pueda supervisarse o controlarse regularmente el nivel de llenado del material de llenado situado dentro.A container configured in this way makes possible, because of the optical strip, that can be monitored or regularly check the filling level of the filling material located inside.

En las reivindicaciones 2 a 7 se hacen patentes otras particularidades de un recipiente de tipo cuba, conforme a la invención y a un procedimiento y un dispositivo para su fabricación.In claims 2 to 7 patents are made other particularities of a vessel of the Cuba type, according to the invention and a procedure and a device for its manufacturing.

A continuación se explica con más detalle la invención con base en un ejemplo de ejecución representado de forma simplificada en un dibujo. Con ello muestranThe following explains in more detail the invention based on an exemplary embodiment represented in a manner Simplified in a drawing. With that they show

la figura 1 una representación en perspectiva de un recipiente conforme a la invención,Figure 1 a perspective representation of a container according to the invention,

la figura 2 una sección a través de un dispositivo conforme a la invención para fabricar un recipiente de la figura 1 yFigure 2 a section through a device according to the invention for manufacturing a container of figure 1 and

la figura 3 un detalle a mayor escala del dispositivo de la figura 2, en la región de formación de una tira óptica.Figure 3 a larger scale detail of the device of figure 2, in the region of formation of a strip optics.

En la figura 1 del dibujo se muestra un recipiente 1 de tipo cuba, que se ha fabricado con material sintético termoplástico a partir de una pieza premoldeada de tipo manguera en un procedimiento de soplado, cuya pared se compone de al menos tres capas diferentes y en cuya pared se ha practicado una tira óptica 2 que se extiende en dirección axial. La pieza premoldeada de tipo manguera para formar el recipiente 1 de tipo cuba se fabrica por medio de un dispositivo, del que se ha representado en la figura 2 del dibujo el depósito 3 del émbolo anular o la cabeza de remanso del émbolo anular. El depósito 3 del émbolo anular se compone en principio de una envuelta de depósito 4, que está unida con una carcasa conocida por sí misma de una forma conocida por sí misma, no representada. La envuelta de depósito 4 dispuesta fijamente en el ejemplo de ejecución representado aloja un émbolo anular 5 desplazable axialmente, en la que se guía con desplazamiento axial una pínola 6 con un hongo de tobera 7. Entre la envuelta de depósito 4 y el hongo de tobera 7 está configurada una rendija de tobera 8, que puede abrirse y cerrarse mediante un desplazamiento axial de la pínola 6. Para este movimiento se ha asignado a la pínola 6 un accionamiento no representado, por ejemplo configurado como unidad de émbolo-cilindro.Figure 1 of the drawing shows a vessel 1 of the Cuba type, which has been manufactured with material thermoplastic synthetic from a precast type piece hose in a blowing procedure, whose wall is composed of at at least three different layers and on whose wall a optical strip 2 extending in axial direction. The piece pre-molded hose type to form container 1 type Cuba is manufactured by means of a device, which has been shown in figure 2 of the drawing the reservoir 3 of the plunger annular or the backwater head of the annular piston. Deposit 3 of annular piston is composed in principle of a reservoir shell 4, which is attached to a housing known by itself in a way known by itself, not represented. The shell of deposit 4 fixedly arranged in the exemplary embodiment shown houses a axially movable annular piston 5, in which it is guided with axial displacement a pin 6 with a nozzle fungus 7. Between the tank wrap 4 and the nozzle fungus 7 is configured a nozzle slit 8, which can be opened and closed by a axial displacement of the pinnole 6. For this movement it has been assigned to pin 6 a drive not shown, for example configured as piston-cylinder unit.

En su región situada por fuera de la envuelta de depósito 4, el émbolo anular 5 posee tres taladros 9, 10, 11 del canal de fluencia, a los que está conectado en cada caso una extrusora para los diferentes caldos de material sintético. A través del taladro 10 del canal de fluencia se alimenta por ejemplo un caldo de material sintético claro o transparente, que forma la llamada capa interior de la pieza premoldeada de tipo manguera a generar y, de este modo, del recipiente posterior 1. Al taladro 9 del canal de fluencia se alimenta un caldo de material sintético, que se compone de un material sintético de reciclaje. Aquí es ventajoso que para este material sintético de reciclaje se utilice el llamado material en rodajas, que aparece durante el moldeado por soplado del recipiente 1. El caldo de material sintético alimentado a través del taladro 9 del canal de fluencia forma la llamada capa intermedia de la pieza premoldeada y, de este modo, del recipiente 1 posterior. Esta capa intermedia no es transparente. A través del taladro11 del canal de fluencia entra finalmente un tercer caldo de material sintético en el émbolo anular 5, que está entintado y se compone de un material estable a los UV. Esta capa de material sintético forma la capa exterior de la pieza premoldeada y, de este modo, del recipiente soplado 1.In its region located outside the envelope of reservoir 4, the annular piston 5 has three holes 9, 10, 11 of the creep channel, to which one is connected in each case extruder for the different broths of synthetic material. Through of the hole 10 of the creep channel is fed for example a broth of clear or transparent synthetic material, which forms the called inner layer of the pre-molded hose type part a generate and, thus, of the back container 1. To the hole 9 a synthetic material stock is fed from the creep channel, It is composed of a synthetic recycling material. Here it is advantageous for this synthetic recycling material to be used the so-called sliced material, which appears during molding by Blowing the container 1. The stock of synthetic material fed through the hole 9 of the creep channel forms the so-called layer intermediate of the pre-molded part and, thus, of the container 1 later. This intermediate layer is not transparent. Through Drill11 of the creep channel finally enters a third broth of synthetic material in the annular piston 5, which is inked and is It consists of a UV stable material. This layer of material synthetic forms the outer layer of the precast piece and, of this mode, of the blown vessel 1.

Los taladros 9, 10, 11 del canal de fluencia se transforman respectivamente, en primer lugar, en un distribuidor anular 12, 13, 14 periférico, al que se conecta en cada caso un canal anular 12a, 13a y 14a que discurre oblicuamente. Estos canales anulares 12a, 13a y 14a desembocan consecutivamente en un canal anular 15 común, que se ensancha paulatinamente hasta la anchura de una cámara 16 del depósito anular en la envuelta de depósito 4. Por medio de que los diferentes caldos de material sintético se alimentan consecutivamente al canal anular 15 común y éste sólo se ensancha paulatinamente hasta la sección transversal de la cámara 16 del depósito anular, se garantiza que las capas aisladas del caldo de material sintético de varias capas no se modifiquen en su estructura, sino que se conserven. Esto es también aplicable al recipiente 1, que se fabrica a partir de la pieza premoldeada de tipo manguera, generada en el depósito 3 del émbolo anular.The drills 9, 10, 11 of the creep channel are respectively, first of all, they become a distributor annular 12, 13, 14 peripheral, to which in each case a annular channel 12a, 13a and 14a that runs obliquely. These channels annular 12th, 13th and 14th consecutively flow into a channel annular 15, which gradually widens to the width of a chamber 16 of the annular reservoir in the reservoir shell 4. By means that the different broths of synthetic material are consecutively feed the common annular channel 15 and this one only gradually widen to the cross section of chamber 16 of the annular tank, it is guaranteed that the insulated layers of the broth of multilayer synthetic material do not change in your structure, but be preserved. This is also applicable to container 1, which is manufactured from the precast part of hose type, generated in reservoir 3 of the annular piston.

En el ejemplo de ejecución representado de la figura 2 se ha previsto en la parte derecha del émbolo anular 5 otro canal 17 más del canal de fluencia, que está unido con una extrusora, desde la que se alimenta un caldo de material sintético translúcido al émbolo anular 5. En caso necesario este taladro 17 del canal de fluencia también puede estar unido con la extrusora, que está conectada al taladro 9 del canal de fluencia. Con ello es sin embargo necesario que al taladro 17 del canal de fluencia esté antepuesta una instalación, a través de la cual pueda controlarse con precisión la presión y la cantidad de caldo de material sintético traslúcido alimentado.In the exemplified execution example of the Figure 2 is provided on the right side of the annular piston 5 other channel 17 over the creep channel, which is linked to a extruder, from which a stock of synthetic material is fed translucent to the annular piston 5. If necessary, this hole 17 of the creep channel can also be attached to the extruder, which is connected to bore 9 of the creep channel. With it is however, it is necessary that the borehole 17 of the creep channel be pre-set an installation, through which it can be controlled precisely the pressure and quantity of material stock Translucent synthetic fed.

El taladro 17 del canal de fluencia desemboca, a cierta distancia de los canales anulares 12a, 13a y 14a que discurren oblicuamente, radialmente en el canal anular 15 común. En la región de desembocadura de este taladro 17 del canal de fluencia se ha insertado en el canal anular 15 un cuerpo de circulación (figura 3) configurado como torpedo 18, que desdobla la capa exterior y la capa intermedia del caldo de material sintético de varias capas y, de este modo, permite la alimentación del caldo de material sintético traslúcido. El torpedo 18 se extiende con ello hasta el caldo de material sintético que forma la capa interior de la pieza premoldeada, que no está entintado. Mediante el caldo de material sintético traslúcido, alimentado a través del taladro 17 del canal de fluencia, se crea en el caldo de material sintético no transparente de la capa exterior y de la capa intermedia una tira transparente, que posteriormente forma la tira óptica 2 en el recipiente soplado 1. De este modo es posible comprobar o supervisar ópticamente, es decir, sin instalación de medición especial, el nivel de llenado en el recipiente 1 de tipo cuba. A través del taladro 17 del canal de fluencia, sin embargo, no se ejecuta de forma ventajosa el caldo de material sintético traslúcido continuamente, sino sólo en la región que forma posteriormente la superficie de envuelta del recipiente 1. Como es conocido, ni en el fondo inferior ni en el fondo superior del recipiente 1 se necesita una tira óptica 2.Drill 17 of the creep channel flows into certain distance from the annular channels 12a, 13a and 14a that they run obliquely, radially in the common annular channel 15. In the mouth region of this bore 17 of the creep channel a circulation body has been inserted in the annular channel 15 (figure 3) configured as torpedo 18, which unfolds the layer outer and middle layer of the synthetic material broth of several layers and, thus, allows the feeding of the broth of translucent synthetic material. Torpedo 18 extends with it to the synthetic material broth that forms the inner layer of the pre-molded piece, which is not inked. Through the broth of translucent synthetic material, fed through hole 17 of the creep channel, it is created in the stock of synthetic material not transparent of the outer layer and the intermediate layer a strip transparent, which subsequently forms the optical strip 2 in the blown vessel 1. In this way it is possible to check or monitor optically, that is, without special measurement installation, the filling level in vessel 1 of the cuba type. Through Drill 17 of the creep channel, however, does not run from advantageous form the translucent synthetic material broth continuously, but only in the region that subsequently forms the container wrap surface 1. As is known, neither in the bottom bottom or top bottom of container 1 is needed an optical strip 2.

Claims (7)

1. Recipiente (1) de tipo cuba, fabricado en un procedimiento de soplado con una pieza premoldeada de tipo manguera extrusionada de forma discontinua con material sintético termoplástico, con una pared compuesta de una capa interior de material sintético traslúcido, una capa exterior de material sintético entintado estable a los UV y al menos una capa intermedia de un material sintético no traslúcido, presentando la pared una tira óptica (2) de material sintético traslúcido, que se extiende en dirección axial solamente a través de la capa intermedia y la capa exterior.1. Bowl (1) of Cuba type, manufactured in a blowing procedure with a pre-molded hose type part discontinuously extruded with synthetic material thermoplastic, with a wall composed of an inner layer of translucent synthetic material, an outer layer of material synthetic inking stable to UV and at least one intermediate layer of a non-translucent synthetic material, presenting the wall a optical strip (2) of translucent synthetic material, which extends in axial direction only through the intermediate layer and the layer Exterior. 2. Recipiente según la reivindicación 1, caracterizado porque la tira óptica (2) está formada por un material sintético estable a los UV.2. Container according to claim 1, characterized in that the optical strip (2) is formed of a synthetic material stable to UV. 3. Recipiente según la reivindicación 1 ó 2, caracterizado porque la capa intermedia está formada por material sintético de reciclaje.3. A container according to claim 1 or 2, characterized in that the intermediate layer is formed of synthetic recycling material. 4. Recipiente según la reivindicación 3, caracterizado porque el material sintético de reciclaje está formado por el material en rodajas que aparece durante el procedimiento de soplado.4. A container according to claim 3, characterized in that the synthetic recycling material is formed by the sliced material that appears during the blowing process. 5. Procedimiento para fabricar un recipiente de tipo cuba de material sintético termoplástico, que presenta una pared compuesta de tres capas, según al menos una de las reivindicaciones 1 a 4, por el que se reúnen al menos tres diferentes caldos de material sintético anulares, que se corresponden con las capas interior, exterior e intermedia, consecutivamente y centralmente dentro de un canal anular (15) de un émbolo anular (5), dotado de una cámara de depósito anular que se ensancha en forma de tolva y desplazable con relación a una envuelta de depósito (4) y se expulsan, como caldo de material sintético de varias capas para la formación discontinua de una pieza premoldeada de tipo manguera y con el que, a continuación, la pieza premoldeada se sopla para formar el recipiente, caracterizado porque tras la reunión de los caldos de material sintético anulares y antes de su entrada en el ensanchamiento en forma de tolva de la cámara del depósito anular, sólo se alimenta a la capa exterior y la capa intermedia del caldo de material sintético de varias capas, una tira estrecha de un caldo de material sintético traslúcido.5. Method for manufacturing a vessel of the thermoplastic synthetic material, which has a wall composed of three layers, according to at least one of claims 1 to 4, whereby at least three different broths of annular synthetic material are assembled, which correspond to the inner, outer and intermediate layers, consecutively and centrally within an annular channel (15) of an annular piston (5), provided with an annular deposit chamber that widens in the form of a hopper and movable in relation to a reservoir shell (4) and they are expelled, as a stock of synthetic multilayer material for the discontinuous formation of a pre-molded piece of hose type and with which, then the pre-molded piece is blown to form the container, characterized in that after the meeting of the annular synthetic broths and before entering the hopper widening of the chamber of the annular tank, it is only fed to the outer layer and the intermediate layer of the multi-layer synthetic material broth, a narrow strip of a translucent synthetic material broth. 6. Procedimiento según la reivindicación 7, caracterizado porque la alimentación del caldo de material sintético traslúcido se realiza al menos a través de la mayor parte del tiempo del llenado de la cámara del depósito anular.Method according to claim 7, characterized in that the feeding of the translucent synthetic material broth is carried out at least through the majority of the filling time of the annular tank chamber. 7. Dispositivo para fabricar un recipiente de tipo cuba y para ejecutar el procedimiento según al menos una de las reivindicaciones 1 a 6, compuesto de un depósito (3) del émbolo anular con una envuelta de depósito (4) y un émbolo anular (5), desplazable axialmente con relación a la envuelta de depósito, que presenta una cámara del depósito anular que se ensancha en forma de tolva y un canal anular (15) antepuesto, con una rendija de tobera (8) bloqueable dispuesto posteriormente y al menos tres distribuidores anulares antepuestos al canal anular (15), que están conectados al menos a tres extrusoras con diferentes caldos de material sintético a través de taladros del canal de fluencia, caracterizado porque por debajo de la desembocadura de todos los distribuidores anulares (12, 13, 14) en el canal anular (15) y antes del ensanchamiento en forma de tolva de la cámara (16) del depósito anular desemboca en el canal anular (15) un taladro (17) del canal de fluencia, unido con una extrusora para un caldo de material sintético traslúcido, a través de un cuerpo de circulación (18) que sólo se extiende en los caldos de material sintético que forman la capa exterior y la capa intermedia de la pieza premoldeada.7. Device for manufacturing a vessel of the Cuba type and for executing the method according to at least one of claims 1 to 6, composed of a reservoir (3) of the annular piston with a reservoir shell (4) and an annular piston (5 ), axially movable in relation to the tank shell, which has an annular tank chamber that widens in the form of a hopper and an annular channel (15) in front of it, with a lockable nozzle slit (8) subsequently arranged and at least three annular distributors placed before the annular channel (15), which are connected to at least three extruders with different broths of synthetic material through drills of the creep channel, characterized in that below the mouth of all annular distributors (12, 13, 14) in the annular channel (15) and before the hopper widening of the chamber (16) of the annular reservoir, a borehole (17) of the creep channel flows into the annular channel (15), connected with an extruder for a translucent synthetic material broth, through a circulation body (18) that only extends into the synthetic material broths that form the outer layer and the intermediate layer of the precast piece.
ES97941820T 1996-08-31 1997-08-23 CONTAINER OF CUBA TYPE OF SYNTHETIC MATERIAL AND PROCEDURE AND DEVICE FOR MANUFACTURING. Expired - Lifetime ES2210574T3 (en)

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DE19635334A DE19635334A1 (en) 1996-08-31 1996-08-31 Barrel-like container made of plastic and method and device for its production
DE19635334 1996-08-31

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EP (1) EP0923445B1 (en)
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CA2264196C (en) 2005-04-26
EP0923445A1 (en) 1999-06-23
DE19635334A1 (en) 1998-03-05
DE59710927D1 (en) 2003-12-04
WO1998008668A1 (en) 1998-03-05
CA2264196A1 (en) 1998-03-05
EP0923445B1 (en) 2003-10-29
IN189558B (en) 2003-03-29
JP2000516895A (en) 2000-12-19
US6764639B1 (en) 2004-07-20
ATE252974T1 (en) 2003-11-15
BR9711286A (en) 2000-01-18
CN1160179C (en) 2004-08-04
CN1227522A (en) 1999-09-01
JP3935214B2 (en) 2007-06-20

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